35 of a ribbon was used to tie a box. 14 cm was used for the ribbon knot.
- Find the length of the ribbon used.
- What was the original length of the ribbon?
(a)
Length of the ribbon used
= 12 x 2 + 10 x 2 + 8 x 4 + 14
= 90 cm
(b)
Original length of the ribbon = 5 u
Length used to tie the box = 3 u
3 u = 90 cm
1 u = 90 ÷ 3 = 30
Original length of the ribbon
= 5 u
= 30 x 5
= 150 cm
Answer(s): (a) 90 cm; (b) 150 cm